Azo coloring-matters.



Be 115 KDGWQ that philosophy, chemists, citizens o; the Ger man E- piZE,residing at Lovey-lumen, near Cologne-on-thel'ihino Germany, haveinvented new anclusew wovemenis in Azo Colorin of ing is 5")QlfiC2l ion.

We, found t1 It new and Y labia azo dyestuffs can obtained on from adori tivc of the 2-11aphthc1-6-sulionic aci ha ng 211052 probably the fHowing genclal if'ormuia:

3. meaning an organic amino radical which does further couple in thesecombinations Withfi L iazo compounfi such of a1 .ino phenol,chioroaminophcnol, meta-phenylenediamin, aminonaphthol, aminonaphiinobmono, oior polysuiimic acid, The above mentianoil iitcorto unknownrivafives of a. p i be oocained c3; chlorid of theQ-napa'tnoi-Lcarboxylic aci with amiaophcnols. aminonaphthols oraminonaphfiml acicis, etc, splitting the carbox w' the, products whichstill 0 c coupled the 0:- ad in the pro of hose pounds can be combinedwith two molecuies of a war-o colrpound, diazoazo compound or a tetra ocompound, or an intermediate product- Hom tetrazo compound and onemolecule of an azo-dycsiufi component.

and is in the shape of its sodiizm salt soluole no water: and 1:1concentrated sulfuric and Washing. i bowing; (1n and, puh crlzcd icks toHack powders d in concentrated su1- 11th a roclmsh to parts of the 1ammo 8 be; tho an? 15 complete tc i coileo'nca on a 1 The good. fastnessto 1i it has 111 a free sta' the formula:

acid E ita a reddi h coloration and yields upon l'cziuciaon Wlih Z1110powder ana acetic acid anilin and 1-amino-2-naphthol-6-sulreddish tobrownish-black colorationgiyieldfonic acid substituted in the sulfonicgroup lug-upon reduction with zinc powder and v V by the residue of l.7diamino-8-naphtholacetic acid an amino-21mphthohdsulfonic 4.6-disulfonicacid. acid compound substituted in' the sulzt'onic Similar dyestuffs areobtained by i'eplac group by the radical of an aminonaphthol ing in thecondensation product the l-ainino containing a diazotizable amino group;and a5 8-naphthol-4.6-disulfonic icid by the 'l-' dyeing wool from anacid bath generally amino-8-naphthol-3.S-disulfonie acid, while fromorange-red to blue to black shades fast 1 the condensation product withthe :Z-aminoto milling, substantially as described.fi-naphthol-T-sulfonic acid' yields more yel- The new azo dyes which areafter being lowish dyestuffs. dried and pulverized generally fromreddish Instead of thepondensation products with to black powderssoluble in water and in the before mentioned aminonaphtholsulconcentrated sulfuric acid generally with a fonic acids condensationproducts of other reddish to brownish-black coloration;yieldaminonaphthol sultonic acids with the sulirig upon reduction withzinc powder and fonychlorid of the Q-naphthol-l-carboxylic acetic acidan amino-2-naphthol-d-sulfonic acid maybe used, furthermore condensationacid compound substituted in the sulfonic products with theaminonaphthols them group by the radical of an aniinonaphthol selves,for instance with LaminoF-najphthol. sultonic acid containing adiazotizable, @ther diazo compounds may be used c. 9'. amino group; anddyeing wool from an acid ortho-toluidin, Xylidin, etc. bath generallyfromorange-red to lolueto We claim black shades fast to milling,substantially 1. The new azo dyes which are after being as described.dried and pulverized generally from reddish The new azo dyes which areafter being to black powders soluble in water and in corn dried andpulverized enerallyfroinreddish to centrated sulfuric acid generallywith a redblack powders soluble in water and in concen- 6e dish tobrownish-bin ck coloration; yielding tra ted sulfuric acid generallywith a reddish upon reduction with zinc powder and acetic tobrownish-black coloration; yielding upon acid anamino-2maphthol-fi-sulfonic acid reduction with zinc powder'and aceticacid compound substituted in the sulfonic group anaInino-Q-naphthol-G-sulfonic acid cone by an organic radical containinga diazotizpound substituted in the sulfonic group by able amino group;and dyeing wool from an the radical of an amincnaphthcl dieuliiensc acidbath generally from orange-red to blue acid containing a diazotizablamino group; to black shades fast to milling, substantially and dyeingwool from an acid bath generally as described. from orange-red to bluetoblack shades fast 7 2. The new azo dyes which are after being tomilling, substantially as described. I dried and pulverized generallyfrom reddish 5. The new azo dye having in afree state to black powderssoluble in water and-in most probably the formula; concentrated sulfuricacid generally with a T LXIv i -soiua on a g J l \n/ fSOzH dOsH whichdye is after being dried and pulverto light, sulfur and milling,substantially as ized in the shape of-its sodium salt .abrowndescribed.v ish-red powder soluble in water and in c0n- In testimony whereof wehave hereunto 90 centrated sulfuric acid' with a reddish coloration;yielding upon reduction with zinc powder and acetic acid Lamino-Q-nahthol- 6-sulfonic acid substituted in the sulfonic group by the residueof 1 7-diamino8-naphthol-cfi-disulfonic acid; and dyeing wool fromanacid bath in yellowish-scarlet fast set our hands in the presence of twosubscribing witnesses.

WVILHELM NEELMEIER. AUGUST SIGWART. \Vitnesses 2 Hens BRI j'CKNER, ,l/lARTIN HERZBERG.

